MySQL CPU Maxing

Question

현재 MySQL 데이터베이스를 보유하고 있으며 CPU 사용률이 600 % 인 MySQL에서 문제가 발생합니다.

사양 :

2.3 GHz의 인텔 제온 E5-2686의 V4 (브로드 웰) 프로세서 또는 2.4 GHz의 인텔 제온 E5-2676 v3의 (하 스웰) 프로세서

RAM의

8의 vCPU의

32기가바이트

100GB 하드 드라이브.

인스턴스는 현재 Ubuntu 14.04.4 LTS 및 MySQL 버전 5.6.33-0ubuntu0.14.04.1-log를 실행하는 AWS로 호스팅됩니다.

my.cnf의 구성은 아래를 참조하시기 바랍니다 :

# The MySQL database server configuration file. 

# You can copy this to one of: 
# - "/etc/mysql/my.cnf" to set global options, 
# - "~/.my.cnf" to set user-specific options. 
# 
# One can use all long options that the program supports. 
# Run program with --help to get a list of available options and with 
# --print-defaults to see which it would actually understand and use. 
# 
# For explanations see 
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html 

# This will be passed to all mysql clients 
# It has been reported that passwords should be enclosed with ticks/quotes 
# escpecially if they contain "#" chars... 
# Remember to edit /etc/mysql/debian.cnf when changing the socket location. 
[client] 
port  = 3306 
socket  = /var/run/mysqld/mysqld.sock 

# Here is entries for some specific programs 
# The following values assume you have at least 32M ram 

# This was formally known as [safe_mysqld]. Both versions are currently parsed. 
[mysqld_safe] 
socket  = /var/run/mysqld/mysqld.sock 
nice  = 0 
log_error=/var/log/mysql/mysql_error.log 

[mysqld] 
# 
# * Basic Settings 
# 
user  = mysql 
pid-file = /var/run/mysqld/mysqld.pid 
socket  = /var/run/mysqld/mysqld.sock 
port  = 3306 
basedir  = /usr 
datadir  = /var/lib/mysql 
tmpdir  = /tmp 
lc-messages-dir = /usr/share/mysql 
skip-external-locking 

innodb_io_capacity = 2000 
innodb_read_io_threads = 64 
innodb_thread_concurrency = 0 
innodb_write_io_threads = 64 
innodb_buffer_pool_size = 2G 
innodb_log_file_size = 1G 

# Skip reverse DNS lookup of clients 
skip-name-resolve 

# 
# Instead of skip-networking the default is now to listen only on 
# localhost which is more compatible and is not less secure. 
bind-address  = 127.0.0.1 
# 
# * Fine Tuning 
# 
key_buffer  = 11G 
max_allowed_packet = 16M 
thread_stack  = 192K 
thread_cache_size  = 8 
# This replaces the startup script and checks MyISAM tables if needed 
# the first time they are touched 
myisam-recover   = BACKUP 
#max_connections  = 100 
#table_cache   = 64 
#thread_concurrency  = 10 
# 
# * Query Cache Configuration 
# 
query_cache_limit = 1M 
query_cache_size  = 16M 
query_cache_type = 0 
# 
# * Logging and Replication 
# 
# Both location gets rotated by the cronjob. 
# Be aware that this log type is a performance killer. 
# As of 5.1 you can enable the log at runtime! 
general_log_file  = /var/log/mysql/mysql.log 
general_log    = 1 
# 
# Error log - should be very few entries. 
# 
log_error = /var/log/mysql/mysql_error.log 
# 
# Here you can see queries with especially long duration 
#log_slow_queries = /var/log/mysql/mysql-slow.log 
#long_query_time = 2 
#log-queries-not-using-indexes 
# 
# The following can be used as easy to replay backup logs or for replication. 
# note: if you are setting up a replication slave, see README.Debian about 
#  other settings you may need to change. 
#server-id  = 1 
#log_bin   = /var/log/mysql/mysql-bin.log 
expire_logs_days = 10 
max_binlog_size   = 100M 
#binlog_do_db  = include_database_name 
#binlog_ignore_db = include_database_name 
# 
# * InnoDB 
# 
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/. 
# Read the manual for more InnoDB related options. There are many! 
# 
# * Security Features 
# 
# Read the manual, too, if you want chroot! 
# chroot = /var/lib/mysql/ 
# 
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca". 
# 
# ssl-ca=/etc/mysql/cacert.pem 
# ssl-cert=/etc/mysql/server-cert.pem 
# ssl-key=/etc/mysql/server-key.pem 

[mysqldump] 
quick 
quote-names 
max_allowed_packet = 16M 

[mysql] 
#no-auto-rehash # faster start of mysql but no tab completition 

[isamchk] 
key_buffer  = 512M 

# 
# * IMPORTANT: Additional settings that can override those from this file! 
# The files must end with '.cnf', otherwise they'll be ignored. 
# 
!includedir /etc/mysql/conf.d/ 

Answer 1

첫째,있는 general_log, 모든 시간을 활성화 할 필요를 비활성화하여 시작합니다. 일반 로그는 문제 해결 및/또는 테스트 목적으로 매우 유용하지만 프로덕션 데이터베이스에서 성능 쿼리 킬러입니다.

또한, 혼합 엔진 (MyISAM 및 InnoDB)을 사용하는 경우 innodb_buffer_pool_size에 더 많은 메모리를 할당 할 수 있습니다. 그러나 Innodb 만 사용하는 경우이 변수를 24G로 설정하고 key_buffer_size를 수백 메가 바이트로 설정할 수 있습니다.

MyIsam 만 사용하는 경우 Innodb 엔진을 완전히 (skip-innodb) 비활성화하고 key_buffer_size와 같은 Myisam memroy 관련 매개 변수를 늘리십시오.

희망이 있습니다.